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authorDave Airlie <airlied@redhat.com>2012-01-20 10:34:58 +0000
committerDave Airlie <airlied@redhat.com>2012-07-06 15:58:37 +0100
commitfb9e9339876d0a7c4821f9dbea1635a43a06da01 (patch)
treebfca73d27765f6112eede3caff0edee49319722f
parent652fe8d9dd2393127b11741ba63cb95a83ad454f (diff)
dri2proto: add prime protocol support. (v2.1)
So we reserve bits 16->19 for offload device ids, this means we can have 6 offload devices, which is plenty for now, and we can bump this further later without fear. v2: I suck at maths, that is all. Fixed up the maths to match reality. v2.1: fix typo Reviewed-by: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Kristian Høgsberg <krh@bitplanet.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--dri2tokens.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/dri2tokens.h b/dri2tokens.h
index 16c9008..bdca866 100644
--- a/dri2tokens.h
+++ b/dri2tokens.h
@@ -45,6 +45,11 @@
#define DRI2BufferDepthStencil 9
#define DRI2BufferHiz 10
+/* keep bits 16 and above for prime IDs */
+#define DRI2DriverPrimeMask 7 /* 0 - 7 - allows for 6 devices*/
+#define DRI2DriverPrimeShift 16
+#define DRI2DriverPrimeId(x) (((x) >> DRI2DriverPrimeShift) & (DRI2DriverPrimeMask))
+
#define DRI2DriverDRI 0
#define DRI2DriverVDPAU 1